B-Pian by AcousticsampleS is a Virtual Instrument Audio Plugin for Windows and Mac OS X. It includes, and is therefore "powered by", UVI Workstation, which functions as a VST Plugin, an Audio Units Plugin and an AAX Plugin.

The B-Pian Upright is a bad, old, out of tune, mechanically unperfect but still usable upright piano. After watching a movie (we won't say which one) scene with a guy playing on an old upright and hearing what clearly was a 9 foot grand, we decided that it was time to produce that sound everybody knows, the sound of the piano you played on when you started learning the piano, the one that you were at your friends place and is taking dust and that goes out of tune in two weeks.